Angle guide attachment for boring-tools.



W. H. WHIGHAM.

ANGLE GUIDE ATTACHMENT FOR BORING TOOLS.

APPLICATION EILED IEIL'I. 1910. Patented Sept 13,1910.

WITNESSES to the accompanyin UNITED STATES PATENT OFFICE.

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ANGLE GUIDE n'r'rncnman'r FOR Bonn e-roots.

To all whom it may concern:

Be it known that I, WILLIAM H. Ware-- HAM, a citizen of the UnitedStates of America, residing at California, in the county of Washingtonand State of Pennsylvania, have invented; certain new and useful Improvements in Angle Guide Attachments for Boring-Tools, of which thefollowing is a specification, reference being had therein drawing. Thisinvention re ates to an angle ide attachment for boring tools, particuarly for a bit brace stock, and the object thereof is to provide anattachment for tools of such class for indicating the position of theboring tool to assist the operator to guide it properly when boringvertically or angular y, and the device furthermore enables the boringto be had at any angle, horizontally or vertically, without the emloyment of a guide such as a square or bevdl.

Further objects -of the invention are to v rovide an angle guideattachment for her mg tools, particularly a bit brace or stock, whichcan quickly and conveniently be set up to cooperate with the boringinstrument, which is comparatively simple in its construction andarrangement, strong, durable, eflicient in its use, and inexpensive tomanufacture.

With the foregoing and other objects in view the inventionconsists ofthe novel construction, combination and arran ement of parts ashereinafter more speci cally described and illustrated in theaccompanying drawing wherein is shown the preferred embodiment of theinvention, but it is to be understood that changes, variations, andmodificat ons can be resorted to which come within the scope of theclaim hereunto appended.

- In the drawings, wherein like reference characters denotecorresponding parts throughout the several views,eFigure 1 is anelevation of a bitbrace showing the adaptation therewith of an angleguide attachment in accordance with this invention, Fig. 2 is asectional elevation of the attachment, and Fig. 3 is a top plan with thecover removed.

Referring to the drawings in detail, 4 denotes a brace provided with apair of screwthreaded sockets as at 5, 6 res ectively.

- Each of said sockets has the axis t ereof in alinement with the axisof the bit 7. In

Fig. 1 ofthe drawing the bit as well as the Specification or LettersPatent. Patented Sept, 13, 1910,

Application filed February 7 1910. Serial No. 542,638.

brace is shown disposed at an angle for boring out an angle of 15 asindicated by broken lines as at a with respect to the vergical, asindicated by broken lines as at The angle. guide attachment which isadapted'to be secured in the socket 5 when boring overhead or at anupward angle of more than 20, or to be secured in. the socket 6 whenboring downwardly or horizontally, consists of a base plate 8 which isflanged as at 9, and screw-threaded as at 10, and provided with a pocketas at 11. Formed integral with and projecting from the outer face of'thebase 8 is a threaded stem 12 which is adapted to engage in either of thescrew-threaded sockets 5,6 for coupling the attachment to thebrace asclearly shown in Fig. 1.

Snugly fitting into the pocket 11 and coupled with the base 8 by anextension 8 is a receptacle 13 constructed of transparent material andin the form of a spherical segment, the flattened portion or bottom 14of the receptacle engaging the bottom of the pocket 11. face of thereceptacle 13 is perfectly true and upon the outer face of thereceptacle 13 is a series of circular lines 15 which are spacedaccurately apart and indicate degree lines, starting at 90 at the top ofthe receptacle down to zero as at c and continuing from zero to 20 as atd. The rece tacle 13 'is filled with any well known liqui used in aspirit level, in such a manner as to provide the air bubble e.

When the attachment is not used it is inclosed by a cover 16 which isinteriorly' threaded as at '17 for engagement with the threads 10 andabuts against the flange 9 as clearly shown in Fig. 2. The cover 16 actsas a shield to prevent the breaking of the transparent rece tacle 13.

It is evident, y providing an attachment in the manner as hereinbeforeset forth and connecting it to the brace 4, that a guide is provided forany desired angle, and in this connection it will be stated that byholding the brace so that the bubble will be on any desired line theangle for boring will be set and when turning the brace the bubble canbe caused to follow the desired degree line whereby the hole will beaccurately bored.

To revent the operators hand from interferlng with the arrangement, thebrace is ofiset at each side as at 18, 19 respectively,

: and this'will prevent the operator-"engaging the attachment whenturning the brace.

' What I claim is z.

An angle guide attachment for boring tools comprising a base plate, athreaded stem projecting from one face thereof, said base plate having apocket in its other face,

a transparent receptacle in the form of a' spherical segment snuglyextending in and snugly. engaging the-walls of said pocket and providedwith a plurality of parallel evasee ALBERT D. OOATSWORTH,

FRED W. WHIGHAM.

